Question

Como passar a frase para past perfect na interrogativa e negativa
I had been in Flórida
She had slept at 9:OO p.m

Answer 1

Negando o verbo auxiliar do passado perfeito had, acrescentando not depois dele. Had not ou hadn't (forma contraída).

Passando as frases pro negativo:

I had not been in Florida.

She hadn't slept at 9:00 p.m.

Na interrogativa basta pôr o verbo auxiliar had antes do sujeito.

Exemplo usando as frases:

Had I been in Florida?

Had she slept at 9:00 p.m?

Espero ter ajudado!!!